🔍 Key Concepts

• Diesel piston ring seating and how rings wear into the cylinder wall pattern • How surface patterns on a cylinder wall help retain lubricating oil • Common shop term mechanics use for the ‘criss‑cross’ scratch pattern inside a cylinder

💭 Think About

• Which choice sounds like a pattern that would leave tiny intersecting grooves that can hold oil on the cylinder wall? • Think about what you see if you look down a freshly machined engine cylinder with a light—what word do technicians usually use to describe that visible pattern? • Which terms in the choices are not commonly used in engine rebuilding or diesel maintenance manuals?

✅ Before You Answer

• Visualize the inside of a finished cylinder wall—do you see straight lines, ribs, or a criss‑cross pattern? • Recall typical engine-rebuild terminology from manuals or shops; which of these phrases have you actually seen or heard? • Make sure the method you pick clearly relates to both ring seating and lubrication retention.